Oil-switch.



H. A. YEARICK & E. SCHRElBER.

OIL SWITCH.

APPLICATION FILED OCT- 2, 1914.

Patented June 6,1916.

2 SHEETSSHEET I.

H. A. YEARICK & E. SCHREIBER.

OIL SWITCH. APPLICATION FILED OCT. 2. 1914.

Patented Juno 6, 1916.

2 SHEETS-SHEET 2 Memo -- UNITED STATES vPATENT.()f iliIEI(1]il.

HERBERT A. YEARICK AND EDWARD SCHREIBER, F SUNBURY, PENNSYLVANIA.

OIL-SWITCH.

Specification of Letters Patent.

Patented June 6, 191-6.

' Application filed October 2, 1914. Serial No. 864,667.

To all whom it may concern I ,1 Be it known that WG, HERBERT A. YEAnIeK and EDWARD SGHREIBER, citizens of the United States, residing. at Sunbury, in the county of Northumberland and State of v Pennsylvania, have invented certain new and useful Improvements in Oil-Switches, of

which the following is a, specification.

This invention relates to oil switches, that is, electrical switches which make and break an electrical circuit in oil for the purpose of minimizing the amount of sparking and fusing at the contacts of the switch due to the opening andclosing of the same.

The object of our invention is to provide a switch. of the character above set forthwhich would be simple in construction, cheap i to manufacture and one which will be positive' in its operation.

, "Another object of ourvinventlon 1s to provide a suitable improved casing for the switch, and to provide means in the casing for supporting the switch elements 1n such a manner as to dispose the' circuit controlling means in oil.

A still further object of our invention is to provide a partition within .the casing which will separate the oil chamber and electrical contacts from the lead-wires and operating lever.

A. still further object of our invention is to provide a novel and improved means whereby to actuate the switch from the exterior of the casing.

With the above and other objects in view this. invention resides in the construction,

' combination and arrangement of the parts as hereinafter set forth in the specification an dillustrated in the accompanying drawings, in which a Figure 1 is a longitudinal sectional view of our improved casing illustrating the interior of the same and the arrangement of the switch mechanism therein. Fig. 2 is a top plan view of the same, parts being broken away to illustrate the interior arrangement of the casing. Fig. 3 is a transverse sectional view taken on the line 33 of Fig. 1, and looking in the direction of the arrows. Fig. 4 1s a fragmentary view of the blade and the connection between the same and the operating mechanism,

Similar reference characters indicate similar parts throughout the various vlews of the drawings.

Referring more particularly to the drawings in which the preferred' embodiment of our invention is illustrated, we provide a casing having a lower portion 1 and an upper portion 2, said portions of the casing being securedtogethe'r by means of screws 3, which pass through ears or lugs 4 formed on the adjacent marginal edges of the sections 1 and 2 of the casing. The upper por: tlon 2 of the casing is provided on its lower marginal edge with an inwardly extending flange or ledge 5, said flange or ledge 5 serving as a means to assist in sustaining the swltch mechanism 1n operative. posltion w1th1n the casing. The flange 5 provldes a substantially rectangular opening 6, said opening 6 being closed by means of a plate or sheet 7.. of insulating material, which is preferably asbestos, for the purpose of lnsulating the various contacts and binding posts of the switch. The upper portion 2 of the casing is rigidly secured to a wall 8 by means of lugs 9 which may be the switch board in a power house or elsewhere.

.We will now describe the switch mechanism proper; the operating mechanism therefor will be describedhereinafter. In

the preferred form of switch which we desire to utilize we provide transverse bars 10,

pole double-throw switch which may be utilized for a three-wire Edison transmission system or may be-used for three-phase high tension alternating currents, where it is absolutely necessary that circuits be made and broken in oil.

We have provided a peculiar form of pole for the terminals of the switch,- the construction of the same being illustrated to a shaft 32, said shaft 32 ,posite ends of the terminals 15 are provided with spaced lugs 17 as utilized in the usual form of knife switch, the lower portlon of the terminals 15 being supported on the transverse bars'13 and 14, a strap of insulating material 18 being interposed between the member 13 and the terminal 17 whereby to prevent electrical contact between the two. A bolt 19 serves to clamp the two members 13 and 17 together, an insulating washer 20 being provided to insure the proper insulation of theparts. The bolts 19 pass through lugs 19 formed on the opposite sides of the terminal poles 17 The upper portion of the terminal 15 adjacent the cross bar 16 is bent at right angles as indicated at 15 and is insulated from the cross bar 16 by means of a plate or strip of insulating material 21. As will be readily noted in Fig. 1 the upper portions 15 of the terminals 15 are provided with binding posts 22, to which are secured the line wires of an electrical circuit.

As will be readily noted in the drawings, particularly in Fig. 1, the terminals 17 are disposed at an angle relative to the vertical portions 15 so as to more readily receive the blades 23 of the switch, each blade 23 being hinged at 24 to a .lug 25, each of said lugs 25 being in communication with a portion of an electrical circuit. The lugs 25 are carried by and insulated from transverse bars 26 similar to the hereinbefore mentioned transverse bars 10 and 16, thelower ends of the said blades 23 being secured together so as to move through the arc of a circle on their respective hinged points simultaneously. The simultaneous movement of the switch blades 23 is accomplished by means of a transverse bar 27, said transverse bar having the lower ends 28 of each of the blades 23 secured to but insulated therefrom by means of a strip of insulating material 29. The opposite ends of the transverse bar 27 are provided with trunnions 30, for a purpose which will be hereinafter apparent. As is illustrated to advantage in Fig. 1 the switch blades 23 and line terminals 17 are submerged at all times in oil, the oil level being clearly indicated in this figure.

In order to operate the switch blades 23 from the exterior of the portion 1 of the casing we provide an arm 31, said arm 31 being carried by and adapted to rotate with being j ournaled in of the portion 2 of the casing at 33. The lower end of the the sides 2 as indicated arms 31, of which there are two in the present instance, are slotted as indicated at 34 and are adapted for engagement with the trunnions of the ends of the transverse bar 27 as illustrated to advantage 1n Fig. 4. Openings 35 are provided in the flanges 5 to allow of passage of the arms 31 therethrough. Mounted on either end of the shaft 32 is an operating lever or handle member 36, the said handle 36 being provided with a plurality of openings 37 through which may be secured a rope or other means for operating the switch from a distance. The shaft 32 has been shown of- A cover 38 for the upper portion 2 of the casing is provided, the said cover 38 being securely held in position by means of bolts or screws 39 which pass through the same and are secured in the flange 5.

From the above description taken together with the drawings it is thought that a clear and comprehensive understanding of this invention may be had.

Referring to Fig. 1 it will be seen that oscillating the arm .36 to either of the dotted line positions will cause the shaft 32 to rotate, carrying the arms 31 to either of the dotted line positions. The lower ends of the switch blades 23 being connected to the arms 31 will be swung on their pivoted points 24 into electrical contact with the terminals 17 thereby closing the circuit for either 'set of terminals depending on which direction the arm 36 is moved. By providing a suitable electrical connection between the switch. and a motor or other device the direction of the current delivered thereto may be. reversed thereby reversing the direction of the rotation of the motor, it being of course understood that we do not desire to belimited t0 the use set forth above. Openings 40 have been provided in the upper portion 2 of the casing through which the lead wires may be brought.

While we have shown and described a particular form and construction for our invention we desire that it be understood that We may make such changes in the details of construction thereof which shall not depart from the spirit and scope of the appended claim. a

Having thus described our we claim and desire Patent, is

An oil switch comprising in combination a casing having upper and lower sections, transverse bars on the upper section, a plurality of circuit closing arms simultaneously operable and pivoted upon one of said transverse bars an operating lever therefor, circult termmals comprising vertical strips invention, what to secure by Letters bent at their upper ends for engagement In testimony whereof we aflix our signawith certain of the transverse bars but intures in presence of two witnesses. sulated Supports for-said circuit terminals, insulating 5 plates associated therewlth, said terminals EDWARD SGHREIBER' being disposed in the path of movement of WVitnesses: said circuit closing arms, substantially as J. H. MCDEVITT, described. F. A. WITMER.

copies of this patent may be obtained for iive cents each, by addressing the "Commissioner 0! Patents,

' Washington, D. G." 

